I've spent so much time on this subject over the last two-and-a-half years, and yet still the "As long it works fine..." attitude persists...
I'm sorry to be the one to tell you this, but: It will not work fine, and you are very likely to lose your money on goods that are likely to be unusable, because they were probably originally destined to be trashed.
Let me give a quick run-down;
1: False-capacity fakes on eBay account for most flash-media sales on eBay. To my knowledge, there is no such thing as a fake that is true-capacity but simply slower and poorer-built than the real thing, because there isn't any profit in that.
2: Pretty much all fakes on eBay are made from very low-grade chips, and many will fail very quickly. They are NOT cards with the wrong sticker on - they are usually faulty hardware which was meant to be destroyed, which was retrieved before reaching the furnaces and sold on the black market. Fake flash-media has a controller-chip that has a known exploit. What is done is that the controller is hacked in order to make the card report a false size to the operating system. Of course, this results in the controller being unable to properly wear-level and so on, as well. It doesn't matter how much data you can put on it, it will very likely speedily die anyway*. There is no known easy way to restore a fake-capacity SD Card to its true capacity, and even so, you would never be able to trust it.
3: You will very likely lose your data and you will probably have a very hard time getting a refund. Genuine flash-media prices are currently falling again, and it is possible to get genuine 32GB cards for a realistic price now (if you're willing to settle for Class 2, you can get genuine 32GB cards at around £39.99 or so). Check Amazon, Amazon UK, Play.com, or Newegg.com (but I would advise avoiding third-parties selling through these sites, as a precaution). You cannot get 32GB of flash, plus controller hardware, casing, labels, packaging, and distribution for $12.90.
I would suggest visiting
SOSFakeFlash, and searching for the name of your seller there - if it is not listed, please report the seller if or when you receive the goods and find that they're fake. I would also recommend reading
this guide, because the auction listing you linked to appears to have all of the warning signs that most listings for fakes tend to have (look at all those asterisks!).
SOSFakeFlash also have resources relating to how to obtain a refund, and I have some further information linked in my signature - I wish you the best of luck.
*(If anyone has watched the Christmas movie "Mrs. Santa Claus", this reminds me of the "Tavish Toys" factory scene.
)